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CVE-2025-3552: Critical Unrestricted File Upload Vulnerability in Lingxing ERP 2

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Overview

A significant vulnerability identified as CVE-2025-3552 has been discovered in Lingxing ERP 2. This vulnerability is of critical concern due to its potential to allow unauthorized file uploads, which can lead to system compromise or data leakage. The exploit has been publicly disclosed and may already be in use. Despite early notification, the vendor has yet to respond or provide a patch for this vulnerability.

Vulnerability Summary

CVE ID: CVE-2025-3552
Severity: Critical (CVSS: 7.3)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Unrestricted file upload leading to potential system compromise or data leakage.

Affected Products

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Product | Affected Versions

Lingxing ERP | 2

How the Exploit Works

The vulnerability exists due to an insufficient security restriction within the /Api/TinyMce/UploadAjax.ashx file of Lingxing ERP 2. Attackers can manipulate the File argument to upload arbitrary files to the system. No user interaction or special privileges are required to exploit this vulnerability.

Conceptual Example Code

An attacker might exploit the vulnerability by sending a malicious HTTP POST request similar to the following:

POST /Api/TinyMce/UploadAjax.ashx HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="File"; filename="malicious_file.exe"
Content-Type: application/octet-stream
<binary data>
------WebKitFormBoundary7MA4YWxkTrZu0gW--

Mitigation

In the absence of a vendor-supplied patch, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. These measures can help detect and prevent unauthorized file uploads. Users should also limit access to the affected component until a patch is available.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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